Question about Ektachrome color cast

Discussion in 'Darkroom Developing and Printing' started by Robert J. Mathes, Sep 17, 2003.

  1. I recently had a 4x5 Readyload sheet of Ektachrome developed and it came
    back with a magenta/cyan (purple) colorcast. Fresh film exposed under
    color-corrected flash in a fairly "neutral" environment (meaning the
    colorcast was not a result of anything in the room). The colorcast is most
    obvious because the background was white paper lit from the key light
    source. Is this colorcast a result of process error, such as incorrect
    temperature of the process chemicals, or are there other possible reasons?
     
    Robert J. Mathes, Sep 17, 2003
    #1
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  2. My guess a process error, but could be the film got too warm somewhere?
    Or your ambient light creeped in at a shutter speed slow enough.
    (although I don' know what light source
    would produce that kind of shift)
     
    Gregory W. Blank, Sep 17, 2003
    #2
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  3. As for the film getting too warm somewhere, it certainly wasn't in my
    possession. The film was refrigerated until 24 hrs before use and then
    stored in what was room temperature, definitely not warm. I am pretty
    conscientious about protecting my film and paper. Thanks for your reply.
     
    Robert J. Mathes, Sep 17, 2003
    #3
  4. Robert J. Mathes

    Sherman Guest

    It sounds like a processing error, but exactly what kind I don't know. In
    my very limited experience processing E6 myself I have found color shifts if
    my timing on the first developer was off even a little. The other steps are
    somewhat more forgiving.

    If the film was processed by a lab I doubt timing or temperature would be a
    likely issue (most machines are pretty good at doing those things correctly
    once dialed in). It might have been exhausted developer.

    Sherman
    http://www.dunnamphoto.com
     
    Sherman, Sep 17, 2003
    #4
  5. Robert J. Mathes

    Terry Brow Guest

    #1 Exposure through the base...unlikely since it was a Readyload.
    #2 Colour Developer ph too low.
     
    Terry Brow, Sep 18, 2003
    #5
  6. Robert J. Mathes

    Frank Pittel Guest

    : I recently had a 4x5 Readyload sheet of Ektachrome developed and it came
    : back with a magenta/cyan (purple) colorcast. Fresh film exposed under
    : color-corrected flash in a fairly "neutral" environment (meaning the
    : colorcast was not a result of anything in the room). The colorcast is most
    : obvious because the background was white paper lit from the key light
    : source. Is this colorcast a result of process error, such as incorrect
    : temperature of the process chemicals, or are there other possible reasons?

    It could be a number of things. The first suspect is development problems. This includes
    the chemistry, temperature, time, etc. The second is the handling of the film. Did the
    film get exposed to heat? The third and one that I've had happen to me more then the
    other two is the use of film that has expired.

    --




    Keep working millions on welfare depend on you
     
    Frank Pittel, Sep 18, 2003
    #6
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